Steel support cleaning device

The utility model relates to a steel support cleaning device which is characterized by comprising a stretching rod capable of being adjusted in a telescopic mode. The control handle is rotationally mounted on a rod body of the lengthening rod; the string is wound on the control handle, and the string is unwound or wound by rotating the control handle; the first rotating plate and the second rotating plate are rotationally arranged at the end, away from the control handle, of the lengthening rod and are oppositely arranged, brushes are arranged on the two opposite side portions of the first rotating plate and the second rotating plate, and the thin rope is connected with the first rotating plate; the spring is arranged between the first rotating plate and the second rotating plate; the control handle is rotated to wind the thin rope and drive the first rotating plate to rotate, the spring is lengthened, the thin rope is released, and the elastic force of the spring drives the first rotating plate to rotate tow